The readme is pretty accurate; this is just a long, featureless corridor with 455 imps. You have many hundreds of rockets with which to fry 'em, and the level only takes about a minute to finish. You also have a berzerk pack, so you could try Tyson-ing the level, if you were bored out of your mind. Otherwise this isn't the most shiningest example of the Doom level designer's craft.